[vsnet-grb-info 17585] GRB 160216A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19016
SUBJECT: GRB 160216A: Swift/UVOT Upper Limits
DATE:    16/02/17 00:04:06 GMT
FROM:    Paul Kuin at MSSL  <npkuin at gmail.com>

N. P. M. Kuin (UCL-MSSL) and E. Troja (NASA/GSFC/UMCP) report
on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 160216A
101 s after the BAT trigger (Troja et al., GCN Circ. 19014).  No optical
afterglow consistent with the XRT position (Beardmore et al. GCN Circ.
19015) has been detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           101          251          147         >19.8
u_FC               314          564          246         >19.1
white              101         5921          541         >20.6
v                 4695         6301          364         >19.0
b                 4079         5716          393         >19.9
u                  314         5510          442         >19.3
w1                5105         5305          197         >19.4
m2                4900         5099          197         >19.7
w2                4490         6126          393         >20.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.05 in the direction of the burst
(Schlegel et al. 1998).